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Preparation method of nickel-cobalt-manganese ternary positive electrode spherical material

A nickel-cobalt-manganese, cathode technology, applied in nanotechnology for materials and surface science, chemical instruments and methods, nickel compounds, etc., can solve the problems of high difficulty in operation, large pollution, etc. Performance, the effect of simple continuous production

Inactive Publication Date: 2020-04-21
HEFEI GUOXUAN HIGH TECH POWER ENERGY CO LTD CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a method for preparing a nickel-cobalt-manganese ternary positive electrode spherical material, in which a flux, a fluorine source and nanometer mesoporous silica are introduced into the nickel-cobalt-manganese ternary precursor material, and stirred by an aqueous system After sanding, spray granulation and drying, the nickel-cobalt-manganese ternary positive electrode spherical material based on mesoporous silica was prepared. While improving the energy density and cycle stability of the material, the preparation method was optimized, and the pollution and difficult operation were solved. The problem

Method used

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  • Preparation method of nickel-cobalt-manganese ternary positive electrode spherical material

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Embodiment 1

[0041] A method for preparing a nickel-cobalt-manganese ternary positive electrode spherical material, specifically comprising the following steps:

[0042] (1) According to the molar ratio Li:Me=1.03, take 100kg of nickel-cobalt-manganese ternary precursor (Me) and lithium source, and take 1kg of vanadium pentoxide (V 2 o 5 ), 10kg of nano-mesoporous silica, 1kg of glucose and deionized water were put into a mixing tank and mixed for 1 hour to obtain a slurry (solid mass content 35%), and then sanded by a sand mill for 50 minutes. During sanding, the particle size of the slurry was controlled to D50 D100 is 0.5-1.5μm, D100 is 20-50μm; finally carry out centrifugal spray granulation drying to obtain the mixture, the parameters of centrifugal spray granulation drying include inlet temperature 250℃, outlet temperature 100℃, The pump speed is 600L / h, the centrifuge parameters are 20000 rpm, and the particle size of the dried material is controlled to be 0.5-1.5μm for D50 and 20-...

Embodiment 2

[0047] A method for preparing a nickel-cobalt-manganese ternary positive electrode spherical material, specifically comprising the following steps:

[0048](1) According to the molar ratio Li: Me=1.04, take nickel-cobalt-manganese ternary precursor (Me) and lithium source 100kg, and take 40kgV at the same time 2 o 5 , 30kg of nano-mesoporous silica, 5kg of glucose and deionized water were put into a mixing tank and mixed for 40 minutes to obtain a slurry (solid mass content 40%), and then sanded by a sand mill for 100 minutes, and the particle size D50 of the slurry was controlled during sanding. 0.5-1.5μm, D100 is 20-50μm; finally carry out centrifugal spray granulation drying to obtain the mixture, the parameters of centrifugal spray granulation drying include inlet temperature 300℃, outlet temperature 110℃, slurry pump The speed is 600L / h, the centrifuge parameters are 25000 rpm, and the particle size D50 of the dried material is controlled to be 0.5-1.5μm, and the D100 is...

Embodiment 3

[0053] A method for preparing a nickel-cobalt-manganese ternary positive electrode spherical material, specifically comprising the following steps:

[0054] (1) According to the molar ratio Li:Me=1.08, take nickel-cobalt-manganese ternary precursor (Me) and lithium source 100kg, and take 20kgV at the same time 2 o 5 , 20kg of nano-mesoporous silica, 10kg of glucose and deionized water were put into a mixing tank and mixed for 60 minutes to obtain a slurry (solid mass content 40%), and then sanded by a sand mill for 70 minutes, and the particle size D50 of the slurry was controlled during sanding. 0.5-1.5μm, D100 is 20-50μm; finally carry out centrifugal spray granulation drying to obtain the mixture, the parameters of centrifugal spray granulation drying include inlet temperature 300℃, outlet temperature 110℃, slurry pump The speed is 700L / h, the centrifuge parameters are 25000 rpm, and the particle size D50 of the dried material is controlled to be 0.5-1.5μm, and the D100 is...

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Abstract

The invention discloses a preparation method of a nickel-cobalt-manganese ternary positive electrode spherical material. The preparation method comprises the following steps: proportionally mixing andstirring a nickel-cobalt-manganese ternary precursor, a lithium source, a fluxing agent, a sugar source, deionized water and nano mesoporous silica to form slurry, carrying out sanding to control therequired particle size, carrying out spray granulation drying to obtain a mixture, calcining the mixture for the first time, crushing and grading the mixture to obtain a graded material, mixing and coating the graded material and a fluorine source, carrying out secondary calcination, and carrying out crushing, grading, sieving and demagnetizing treatment to obtain the nickel-cobalt-manganese ternary positive electrode spherical material. According to the invention, the fluxing agent, the fluorine source and nano mesoporous silica are introduced into the nickel-cobalt-manganese ternary precursor material, the nickel-cobalt-manganese ternary positive electrode spherical material based on mesoporous silica is prepared through water system stirring, sanding, spray granulation and drying, thepreparation method is optimized while the energy density and the cycling stability of the material are improved, and the problems of large pollution and high operation difficulty are solved.

Description

technical field [0001] The invention relates to the field of lithium batteries, in particular to a method for preparing a nickel-cobalt-manganese ternary positive electrode spherical material. Background technique [0002] The electric vehicle industry is booming, and batteries, as one of the core accessories, have received extensive research and attention. Due to the advantages of high energy density, long cycle life and no memory effect, lithium-ion batteries have always been a hot spot in the research and development of batteries, and have good application prospects in portable appliances, electric vehicles and energy storage. Ternary cathode materials have the advantages of high capacity and high energy density and become the current research hotspot of cathode materials. However, ternary material batteries have problems such as poor safety and cycle life, which requires further improvement of ternary materials. [0003] A preparation method of a fluorine-doped nickel-c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G53/00H01M4/505H01M4/525H01M4/62H01M10/0525B82Y30/00
CPCC01G53/006C01G53/44H01M4/505H01M4/525H01M4/62H01M10/0525B82Y30/00C01P2004/32C01P2004/03C01P2006/40Y02E60/10
Inventor 许奎宋磊计佳佳沈中宇
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY CO LTD CO LTD
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